164 PENTANDRIA. DIGYNIA. 



Species 1. C. Ixvc? stem erect, subsarmentose, mark- 

 ed v\ ith an alternating pubescent line; leaves smooth, 

 subcordate-ovate, acutely acuminate, sinus at the base,, 

 nearly closed; margin and nerves on tlie under side, mi- 

 nutely pubescent; petiole very short; peduncle long; um- 

 bell interrupted, compound, unjbelluli few-fiowered; seg-- 

 ments of the corolla, oval-oblong, ob use; follicles smooth? 

 — Lepanthium cylindric, retusely 5-toothed, nearly entire. 

 Possessing all the habit of Asclepias Vincetoxicnm. Flow- 

 ers small, greenish white. 



Probably Gonolobns Uvis. Mich. 1. p. 119, 



2. august I folium. Stem twining, smooth; leaves smooth, 

 narrow, and linear, thickish; umbell upon a long peduncle; 

 segments of the corolla lanceolate. — 1 epanthuim cylm- 

 dric, obtusely 5-toothed. Follicles — ■ Flowers small and 

 greenish. 



Ceropegia pnhistris. Pursh. 1. p 184. From Carolina 

 to Florida twining rouna rushes and other marsh plants. 



The genus Cynanclmm appertains principally to the 

 warmer regions of America, a smaller number to India 

 and Africa, 2 to the south of Europe, exclusive of Vince- 

 toxicnm so closely allied to this genus; and 1 species even 

 extends to Siberia. Cynanchum is not altogether desti- 

 tute of medical economy; tiie root of C Ipecuaianha of 

 Ceylon and the isle of France is Ui>ed as an enu'tic in 

 doses of 24 grains, and it has receiitly b'.-en discovered in 

 France that the Senna of the sliops was in realit} the 

 leaves of a species of Cijnanchum disguised by an useless 

 admixture ot those of the Cassia Soma. 



:24^. * ENSLENlA.f 



Ciilix small, 5-pai'ted, persistent. Corolla 5- 

 parted, se.^'inents cormivent, erect. Lepanthium 

 simple, 5-parted, petaloid, divided to its base, 

 se^ir-^nts truncate, Hat, eacii terminated by 2 

 central filaments. Stamina as in Asclepias. Pol- m 

 liniuin, lohrs subcylindrif , laterally stipitate. ^ 

 Style 0. Stigma conic, subbilamellate. Fol- 

 licies 2. swiaii? 



t In meuio y of the late Mr. \ioysius Fnileri. an assiduous 

 and practical oofanist patronised m his rt searches in the United 

 States by I'rince Lichtenstein of Ausiria, and to whom Mr. 

 Pursh was fiequently indebted for many of the rarer plants of 

 the Southern Stales. 



